4
6
6
5
8
7
7
0
4
7
6
8
9
1
4
3
1
0
6
8
1
4
9
4
5
7
9
7
1
2
7
7
2
2
2
0
3
1
9
2
3
6
0
3
7
1
8
6
8
8
7
6
7
2
2
8
0
0
4
9
0
8
1
7
2
0
7
9
2
3
2
6
6
1
3
3
2
7
4
8
3
7
2
3
1
6
4
1
3
1
2
3
7
0
5
3
6
8
5
1
3
there are exactly 7 amount of 4